SmogRank / Hong Kong

Air quality in Ma On Shan estimated

Sha Tin, Hong Kong. No ground monitor we can use is in this city, so these numbers are model estimates, not measurements.

≈ 9 µg/m³
Moderate

Estimated PM2.5, 7-day average to 2026-09-30, about 0.6× the WHO 24-hour guideline. 30-day average ≈ 11 µg/m³.

Model estimate from the Copernicus Atmosphere Monitoring Service (CAMS), scaled by 0.50 to match 10 measured cities within 300 km over the last week. Adjusted this way, a single day lands within ×1.5 of what a monitor would read about two times in three: a guide, not a measurement. Not ranked on SmogRank's boards.

Last 30 days, estimated

152026-09-01: ≈ 5 µg/m³ (estimate)09-012026-09-02: ≈ 8 µg/m³ (estimate)2026-09-03: ≈ 9 µg/m³ (estimate)2026-09-04: ≈ 14 µg/m³ (estimate)2026-09-05: ≈ 14 µg/m³ (estimate)2026-09-06: ≈ 9 µg/m³ (estimate)2026-09-07: ≈ 11 µg/m³ (estimate)2026-09-08: ≈ 15 µg/m³ (estimate)09-082026-09-09: ≈ 12 µg/m³ (estimate)2026-09-10: ≈ 11 µg/m³ (estimate)2026-09-11: ≈ 11 µg/m³ (estimate)2026-09-12: ≈ 8 µg/m³ (estimate)2026-09-13: ≈ 7 µg/m³ (estimate)2026-09-14: ≈ 8 µg/m³ (estimate)2026-09-15: ≈ 9 µg/m³ (estimate)09-152026-09-16: ≈ 13 µg/m³ (estimate)2026-09-17: ≈ 12 µg/m³ (estimate)2026-09-18: ≈ 11 µg/m³ (estimate)2026-09-19: ≈ 12 µg/m³ (estimate)2026-09-20: ≈ 15 µg/m³ (estimate)2026-09-21: ≈ 17 µg/m³ (estimate)2026-09-22: ≈ 10 µg/m³ (estimate)09-222026-09-23: ≈ 13 µg/m³ (estimate)2026-09-24: ≈ 12 µg/m³ (estimate)2026-09-25: ≈ 12 µg/m³ (estimate)2026-09-26: ≈ 11 µg/m³ (estimate)2026-09-27: ≈ 7 µg/m³ (estimate)2026-09-28: ≈ 8 µg/m³ (estimate)2026-09-29: ≈ 8 µg/m³ (estimate)09-292026-09-30: ≈ 8 µg/m³ (estimate)

Daily means, UTC days. Dashed line: WHO 24-hour guideline (15 µg/m³).

Measured cities nearby

CityDistance7-day average
Sha Tin6 km9.1 µg/m³
Tai Po9 km13.0 µg/m³
Sau Mau Ping10 km12.0 µg/m³
Kwai Chung11 km12.3 µg/m³
Sham Shui Po12 km11.7 µg/m³
Mong Kok12 km11.6 µg/m³

Estimates contain modified Copernicus Atmosphere Monitoring Service information 2026. How estimates are made.